Fuse for blasting with a liquefied gas and method of producing the same



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ruse non nalas'rme mm a meunrmn ens AND METHOD or rnonucme 'rnn sum ess Toaliliwkom'i t may concern: v i Be known that I, AMBBosE KowAs'rcH, ofBerlin-Gharlottenburg, Leibnizstr. 78, in

the Statesof Prussia and German Em ire,-

uses

have invented certain new and useful for Blastin ywith a Li uefied -Gas. and

Methods of reducing the ame, (for which I have filedv an application in Germany, August 18,1916), of. which'the following is a specification.

M fnventmn; relates to fuses or ignitorsfor lasting wlth aliquefied gas, such as liquid air and, to a method of producing the same.

In the fuses or ignitors known up to the present time, ,a'zoimide of lead, lead azide,

' orsuch like substancesof high initial pewer have been used as a headpiece, acting as a,

plug in. lace of fuluiinateiof mercury but not in 'a mixture with other substances.

According to thepresent invention soot powdered cork dust, or similar substances adapted...to absorb -a li uefiedgas are/intimately mixed with a rea y made explosive of high initial power such as azoimide of lead,

'- combined-state in the fuses or ignitors.

fulminate of mercury or trinitrotolupl. The chief purpose of such a thorough mix-' hitherto not attainable whilst at the same a time removin any danger of explosion in handling sai the are not soaked or saturated with liquefuses or lgtlitOlS as long as fie air. This safety not exist when azoimide of lead or similar substance is used as a top piece or plug. Further in a fuse made according to the present invention,

azoimide of lead or similar substance would thorough intc still be dangerous in view of the possibility of explosion or spontaneous ignition, were a rmixing or commingling' of. the said az'oimi'de of the fuse, such like, not be efiected. After such an intimate mixture however, saiddanger is completely remove Q A mixture .0 for instance 30 percent of azoimide of lead and seventy percent of carboniferous substances or carbon-carriers would, when exposed to a strong heat, and without being saturated with liquid vair, burst into flames. and be consumed without explosion. However, by the admixture of the explosives mentioned above the density of the charge is increased, quence, the efi'ect produced considerably of lead with components as carbon carriers or the and in conse- Specification of Letters Patent. Patented Aug, 11, 1922,. Application filed July is, 1920. Serial a. 97,557.

Plain uses or ignltors with liquid a' ir,it l vis true possess a high explosive power, but

if thisshould'not be sufiicient in certain cases for anypu'rpose, and if it be desirable or necessary to get the wave of detonation considerably intensified and accelerated, this 1 may be brought about by adding one of the explosives mentioned above. This mixture orblend supplies and furnishes, in spite of the low temperature of the liquid air, an initial blasting substance or explosive, which, as experiments have proved, by far S111. passes, the efi'ect of a me unmixed initial blastin substance like t at of plain azoimide' of lea or- .pure -fulminate of mercury or the lik.- This is shown b the fact that,

.' for example explosives w ich cannot be, broughtto -initial detonation by certain quantities-of azoimide' of lead or fulminate or -mercury or such like substances, alone or singly, can be detonated easily and faultlessly by the samequantities, when in the can behandled more freely and withcon siderably'less danger, being less subject and sensible to changes than t e charge or contents of the ordinary blasting tubes or fuses consisting only of the explosive mentioned. The igniting mixture may be saturated inside'or outside the borehole, with liquid oxygen, liquid air, or other liquefied gas. In practical work it is essential that the quantity of the explosive should-be equal to that of the ingredients with which it is mixed and which are to be soaked with oxygen. This is particularly important in the case of mixtures that are rather inert.

The carboniferous substance may also be blendedwith. a certain percentage of substances such as, calcium, chlorine, phosphorus, silicon, barium, magnesium, zinc tin, copper, aluminium, ron and their compounds or their salts. z

Having thus described my invention; what producing fuses for blasting witha-lique- I claim and desire to secure by. Letters Patent is: 1

1. In a.fuse for blasting with a liquefied gas, the combination with substances adapted to absorb 1i uefied gases, of ready made explosive of high initial power, thesaid elements being intimately mixed together. 3 2. In an 'ignitor for blasting with liquid air, the combination of a carbon earner adapted to absorb liquid air, and an explosive. having a great initial effect, both elements being thoroughly mixed together;

3. In an igniting contrivanoe for blasting with liquid air, the combination with soot,

of lead intimately mixed --with of azoimide said soot.

4. The hereinbefore described method of fied gas, which consists in thoroughlyblending a ready made explosive of high initial power with substances adapted to absorb the liquefied gas.

' 5.. The method of nducing ignitors for blasting with a lique ed gas; which consists in intlmately mixing azoimide of' lead with soot. a

In testimony whereof I affixed my signa time in presence of two witnesses. Y ROSE KOWASTOH. Witnessesi i I .PETER MEFFERT,

-FRITZ SANDHAMP. 

